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From: ching@brahms.amd.com (Mike Ching)
Newsgroups: comp.sys.ibm.pc.misc
Subject: Re: Weird disk problem. Help!!!
Message-ID: <1991Feb23.183432.20625@amd.com>
Date: 23 Feb 91 18:34:32 GMT
References: <-~`&%Z+@rpi.edu> <1651@ariadne.csi.forth.GR> <7Z`&Y+@rpi.edu>
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Organization: Advanced Micro Devices; Sunnyvale, CA
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In article <7Z`&Y+@rpi.edu> sigma@jec302.its.rpi.edu (Kevin J Martin) writes:
>costis@csi.forth.gr (Costis Aivalis) writes:
>>Correct me if i'm wrong: I was left with the impression that the
>>Conner IDE drive uses RLL encoding.
>
>Now this sort of thing, as far as I've been able to find out, is usually
>a total mystery.  Which manufacturers use which encodings on their drives?
>Are they all secretly RLL models?
>

One of the advantages of embedded controllers like SCSI and IDE is that
the electronics can be tailored to the characteristics of the drive and
common encodings don't have to be used. The transfer rate of small Conner
drives indicate that they're RLL or ARLL. The large drives have caches
which mask the transfer rates but it's reasonable to assume that they
also use sophisticated encoding schemes.

Mike Ching